38FB4450-F Film Capacitor Equivalent & Substitute Parts

Part Overview

The 38FB4450-F is a 50 µF film capacitor rated for 440V AC operation, manufactured by Cornell Dubilier Electronics (CDE) from the MPF series. This component is designed for motor run and power factor correction (PFC) applications, featuring polypropylene (PP) metallized dielectric construction with radial, can-style packaging and quick connect/disconnect termination.

The 38FB4450-F is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain system functionality and ensure continued availability for replacement and maintenance applications.

Substiute Parts

38FB4450-F

Cornell Dubilier Electronics (CDE)In Stock: 80138FB4450-F Datasheet

Current PartRFQ

38FB4450A-F

Cornell Dubilier Electronics (CDE)In Stock: 103438FB4450A-F Datasheet

DirectRFQ

38FB4450

Cornell Dubilier Electronics (CDE)In Stock: 106138FB4450 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 38FB4450-F are identified based on strict electrical and mechanical parameter matching within the allowed specifications for this product category:

Electrical Parameters (Critical for Substitution):

• Capacitance: 50 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating (AC): 440V (exact match required)
• Dielectric Material: Polypropylene (PP), Metallized (exact match required)
• Operating Temperature Range: -40°C ~ 70°C (exact match required)

Mechanical Parameters (Critical for Substitution):

• Package Type: Radial, Can (exact match required)
• Mounting Type: Chassis Mount, Requires Holder/Bracket (exact match required)
• Termination: Quick Connect, Disconnect (exact match required)
• Lead Spacing: 0.813" (20.64mm) (exact match required)

Acceptable Variations:

• Physical dimensions (length, width, height) may vary within manufacturing tolerances
• Product status (obsolete vs. active) does not prevent substitution
• RoHS compliance status does not prevent substitution when electrical and mechanical parameters match

Parameter Comparison

Engineering Selection Recommendations

38FB4450A-F (Direct Manufacturer Substitute): This part is the primary substitute for the obsolete 38FB4450-F. All electrical and mechanical parameters are identical. The 38FB4450A-F carries active product status and ROHS3 compliance certification. Physical dimensions show minimal variation (height difference of 0.160" / 4.06mm). This part is suitable for direct replacement in all applications where the 38FB4450-F was originally specified.

38FB4450 (Parametric Equivalent): This part matches all critical electrical and mechanical parameters of the 38FB4450-F. Physical dimensions are identical to the main part. The 38FB4450 carries active product status but is classified as RoHS non-compliant. This part is suitable for applications where RoHS compliance is not a regulatory requirement. The parametric equivalence ensures functional compatibility in motor run and power factor correction circuits.

Both substitute parts maintain identical lead spacing (0.813" / 20.64mm), termination type (quick connect/disconnect), and mounting configuration, ensuring compatibility with existing holder/bracket assemblies and circuit board layouts.

Frequently Asked Questions (FAQ)

Q: Can 38FB4450A-F replace 38FB4450-F in all applications? A: Yes. The 38FB4450A-F is a direct substitute with identical electrical specifications (50 µF, ±10%, 440V AC), dielectric material (polypropylene metallized), operating temperature range (-40°C ~ 70°C), and mechanical configuration (radial can package, quick connect/disconnect termination, 0.813" lead spacing). The height difference of 0.160" (4.06mm) is within acceptable mechanical tolerance for chassis-mounted applications using standard holder/bracket assemblies.

Q: What is the difference between 38FB4450A-F and 38FB4450? A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The primary differences are product status (38FB4450A-F is active; 38FB4450 is active) and RoHS compliance (38FB4450A-F is ROHS3 compliant; 38FB4450 is RoHS non-compliant). Physical dimensions are identical except for height (38FB4450A-F: 4.160" vs. 38FB4450: 4.000"). Selection between these two depends on regulatory compliance requirements for the end application.

Q: Are there any mechanical compatibility concerns when substituting these parts? A: No. All substitute parts maintain identical lead spacing (0.813" / 20.64mm), termination type (quick connect/disconnect), and mounting type (chassis mount with holder/bracket). Physical dimension variations are within acceptable tolerances for standard mounting configurations. Existing holder/bracket assemblies and circuit board layouts require no modification.

Q: Can these capacitors be used interchangeably in motor run and power factor correction circuits? A: Yes. All parts listed are specified for motor run and power factor correction (PFC) applications. Identical capacitance (50 µF), voltage rating (440V AC), tolerance (±10%), and dielectric material (polypropylene metallized) ensure functional equivalence across all specified applications.

Q: What is the significance of the product status difference (obsolete vs. active)? A: Product status indicates manufacturing availability. The 38FB4450-F (obsolete) is no longer in production. The 38FB4450A-F and 38FB4450 (both active) are currently manufactured and available. For new designs or long-term supply requirements, active parts are recommended. For replacement of existing 38FB4450-F installations, either active substitute provides equivalent functionality.

Q: Does RoHS compliance affect electrical performance? A: No. RoHS compliance is a regulatory and environmental classification that does not alter electrical performance or functional characteristics. Selection between ROHS3 compliant (38FB4450A-F) and RoHS non-compliant (38FB4450) parts depends on end-use regulatory requirements, not on electrical performance.